JBrHJULATIONS OF THE ANTERIOR LIMBS. 



2M 



into which it is inserted by becoming 

 confounded with the intersesjimoid li^ra- 

 ments. Its posterior face, lined by the 

 synovial membrane of the so-called sesa- 

 moid sheath, is covered by the flexor 

 tendons ; it partly covers the middle 

 ligament. 



The middle ligament, triangular and 

 radiating, is composed of three particular 

 fasciculi : two lateral (seen on each side 

 of the superficial ligament in Fig. 131, 

 A 3), and a median which has been 

 generally confounded with the superficial 

 ligament, although it is clearly distin- 

 guished from it by its inferior insertion. 

 FLxed in common to the posterior imprints 

 of the first phalanx, these three fasciculi 

 diverge in ascending to the base of the 

 sesamoids, where they have their upper 

 insertion. 



The depp ligament is constituted by 

 two small bands concealed beneath the 

 middle ligament. Thin, short, flattened 

 before and behind, and intercrossed (Fig. 

 131, B 3), these bands are fixed to the 

 base of the sesamoids in one direction, 

 and in the other to the superior extremity 

 of the first phalanx, near the margin of 

 its articular surface. This ligament is 

 covered on its anterior face by the synovial 

 membrane of the articulation. 



CARPAL, METACARPAL, AND INTER-PHALANGEAL 

 ARTICULATIONS OF THii HORSE (POSTEKO- 

 LATiRAL view). 



R, Radius ; c, carpus : si, metacarpus ; s, naxicular 

 bone; p, third phalanx. 1, Supercarpal boue ; 

 2, its pi-opei- ligament ; 3, external latei'al lig;i- 

 ment of the carpal articulations (superricial 

 layer); 3, ditto (deep layer); 4, groove for the 

 tendon of the external Hexor of the metacarpus; 

 5, eominon posterior ligament of the carpal 

 articula'ion-i ; 6, superior sesamoidean, or sus- 

 pensory liiraineiit of the fetlock ; 7, an originatioor 

 brancli of ditto ; 8, 8, terminal branches of ditto ; 

 9, baud l:i von off by ditto to the anterior extensor 

 of the phalanges; 10, ten lou of the anterior 

 extensor of the phalanges ; 11, groove formed by 

 the posterior face of the intcrsesamoidean liga- 

 ment; 12, lateral metacarpo-phalangeal ligament 

 (superricial layer); 12', ditto (deep layer) ; 14, 

 inferior superficial sesamoidean ligament ; 15, 

 ditto (deep layer); 16. elenoidal fibro-i-irtilage of 

 the second |)hilaux ; 17, 18, 19, superior, middle, 

 an I inferior bands of that fibro-cartila'j:e ; 20, 

 latei-al ligament of the first inter-phalangcal 

 articulation; 21. lateral posterior ligament of 

 the SHCdud inter-phalan'jeal articulation; 22, 

 anterior lateral ligament of ditto. 

 16 



Kig. 132. 



